Why it works: Clam and crab share more aroma than cooks usually use. They rank in the top 8% of all ingredient pairs, and cooks put them together in 17 recipes. Both carry 2,3,5-trimethylpyrazine, which smells cocoa, roasted. The science ↓
Fish Stock
Ingredients
Directions
Heat a saucepan over medium heat and add the butter.
Add the sliced onion and cook until browned.
Stir in the sliced tomatoes and assorted small fish, and cook until the onions are well browned.
Add the sweet herbs, salt, pepper, and enough water to make the stock.
Simmer for 30 minutes.
Pound the mixture with a wooden pestle, then strain.
Return the strained liquid to the heat and cook until it jellies.
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.
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Clam + crabtop 8% of all pairsSmell alikestrongCooked together17 recipes
Shared aroma: 2,3,5-trimethylpyrazine (cocoa, roasted).
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Onion + tomatotop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Fish + oystertop 9% of all pairsSmell alikemoderateCooked together496 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Butter + crabtop 10% of all pairsSmell alikemoderateCooked together812 recipes
Shared aroma: nonanal (fat, citrus).
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Oyster + crabtop 11% of all pairsSmell alikemoderateCooked together95 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Sweet butter
- Carries the onion and fish flavour and helps the aromatics brown in the pan.
- Onion
- Browning builds deep, savoury flavour in the base of the stock.
- Tomatoes
- Add acidity and body that balance the richness of the fish.
- Assorted small fish
- Provide the main sea flavour and body, as their proteins and bones break down in the liquid.
The step that matters
Cooking the stock until it jellies. Reducing the strained liquid concentrates the gelatin released from fish bones and skin, so it sets when cool. If it is under-reduced, the stock stays thin; if over-reduced, it can turn too salty or sticky.
Swap the tomato
How well each one fits the dish's main ingredients (butter, onion, fish, oyster, clam, smelt, crab):
- Potatofits better
- Horseradishfits better
- Capsicumfits about as well
- Tomatothe original
Fit is the average pairing score against butter, onion, fish, oyster, clam, smelt, crab. Candidates are from the same food group and used in at least 100 recipes.
“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.
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